Whilst working at Playfire I have also performed a number of freelance jobs for PSU.com, a popular PlayStation news and community site run by two of Playfire's founders.
The work was entirely front-end, and I had to make sure that it fit into the existing codebase which was in PHP.
The specific projects that I worked on were a lazy registration system, a navigation redesign, two new social modules to display Twitter and YouTube updates, and a news ticker using my own custom jQuery ticker code.